[Interpreter] Remove LdaConstant+ToName peephole optimization.

src/interpreter/bytecode-peephole-optimizer.cc

Index: src/interpreter/bytecode-peephole-optimizer.cc
diff --git a/src/interpreter/bytecode-peephole-optimizer.cc b/src/interpreter/bytecode-peephole-optimizer.cc
index 7ab7bc571d1501440e2b2c80cb0184b8bdb12e0a..3c8e1f9de4d9180e530b6342c9478525fb72f022 100644
--- a/src/interpreter/bytecode-peephole-optimizer.cc
+++ b/src/interpreter/bytecode-peephole-optimizer.cc
@@ -4,7 +4,6 @@
 
 #include "src/interpreter/bytecode-peephole-optimizer.h"
 
-#include "src/interpreter/constant-array-builder.h"
 #include "src/objects-inl.h"
 #include "src/objects.h"
 
@@ -13,9 +12,8 @@ namespace internal {
 namespace interpreter {
 
 BytecodePeepholeOptimizer::BytecodePeepholeOptimizer(
-    ConstantArrayBuilder* constant_array_builder,
     BytecodePipelineStage* next_stage)
-    : constant_array_builder_(constant_array_builder), next_stage_(next_stage) {
+    : next_stage_(next_stage) {
   InvalidateLast();
 }
 
@@ -83,14 +81,6 @@ void BytecodePeepholeOptimizer::SetLast(const BytecodeNode* const node) {
   last_.Clone(node);
 }
 
-Handle<Object> BytecodePeepholeOptimizer::GetConstantForIndexOperand(
-    const BytecodeNode* const node, int index) const {
-  DCHECK_LE(index, node->operand_count());
-  DCHECK_EQ(Bytecodes::GetOperandType(node->bytecode(), 0), OperandType::kIdx);
-  uint32_t index_operand = node->operand(0);
-  return constant_array_builder_->At(index_operand);
-}
-
 bool BytecodePeepholeOptimizer::CanElideLastBasedOnSourcePosition(
     const BytecodeNode* const current) const {
   //
@@ -289,19 +279,6 @@ void BytecodePeepholeOptimizer::
   }
 }
 
-void BytecodePeepholeOptimizer::TransformToStarIfLoadingNameConstantAction(
-    BytecodeNode* const node, const PeepholeActionAndData* action_data) {
-  DCHECK_EQ(last()->bytecode(), Bytecode::kLdaConstant);
-  DCHECK(!Bytecodes::IsJump(node->bytecode()));
-
-  // TODO(5203): Remove this temporary exception.
-  AllowHandleDereference allow_deref;
-  if (GetConstantForIndexOperand(last(), 0)->IsName()) {
-    node->replace_bytecode(Bytecode::kStar);
-  }
-  DefaultAction(node);
-}
-
 void BytecodePeepholeOptimizer::DefaultJumpAction(
     BytecodeNode* const node, const PeepholeActionAndData* action_data) {
   DCHECK(LastIsValid());